Data spanning the past 90 days through February 07, 2026 reveals that IDEAYA Biosciences's three principal insider shareholders consist of President And Ceo Yujiro S Hata (690.70K shares), Svp And Chief Scientific Officer Michael P. Dillon (78.79K shares), Chief Legal Officer Jason Throne (63.48K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Yujiro S Hata | President And Ceo | 690,695 | 19 Feb, 2025 |
| Michael P. Dillon | Svp And Chief Scientific Officer | 78,789 | 07 Oct, 2021 |
| Jason Throne | Chief Legal Officer | 63,484 | 27 Jun, 2024 |
| Briseno Andres Ruiz | Nan | 26,466 | 02 Feb, 2026 |
| Paul A. Stone | Chief Financial Officer | 9,303 | 31 Aug, 2023 |
| Douglas B. Snyder | Svp And General Counsel | 2,080 | 02 Feb, 2026 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 28 Nov, 2025 | Douglas B. Snyder | Common Stock | A | 1,041 | $16.91 | 2,080 | D | A |
| 28 Nov, 2025 | Briseno Andres Ruiz | Common Stock | A | 1,253 | $16.91 | 26,466 | D | A |
| 30 May, 2025 | Douglas B. Snyder | Common Stock | A | 1,039 | $16.91 | 1,039 | D | A |
| 18 Feb, 2025 | Yujiro S Hata | Common Stock | A | 12,808 | $19.52 | 690,695 | D | M |
| 18 Feb, 2025 | Yujiro S Hata | - | - | 690,695 | D | |||
| 29 Nov, 2024 | Briseno Andres Ruiz | Common Stock | A | 682 | $23.26 | 25,213 | D | A |
| 27 Jun, 2024 | Jason Throne | - | - | 63,484 | D | |||
| 27 Jun, 2024 | Jason Throne | - | - | 16,424 | D | |||
| 27 Jun, 2024 | Jason Throne | Common Stock | A | 6,424 | $13.34 | 16,424 | D | M |
| 27 Jun, 2024 | Jason Throne | Common Stock | A | 47,060 | $7.01 | 63,484 | D | M |
| 29 May, 2024 | Michael Anthony White | - | - | 851 | D | |||
| 29 May, 2024 | Michael Anthony White | Common Stock | D | 851 | $36.78 | 0 | D | S |
| 29 May, 2024 | Michael Anthony White | - | - | 0 | D | |||
| 29 May, 2024 | Michael Anthony White | - | - | 28,500 | D | |||
| 29 May, 2024 | Michael Anthony White | Common Stock | D | 27,649 | $36.23 | 851 | D | S |
| 29 May, 2024 | Michael Anthony White | Common Stock | A | 28,500 | $12.86 | 28,500 | D | M |
| 16 May, 2024 | Yujiro S Hata | Common Stock | D | 30,084 | $41.73 | 682,236 | D | S |
| 16 May, 2024 | Yujiro S Hata | Common Stock | A | 34,433 | $4.31 | 712,320 | D | M |
| 16 May, 2024 | Yujiro S Hata | Common Stock | D | 4,349 | $42.37 | 677,887 | D | S |
| 15 May, 2024 | Yujiro S Hata | Common Stock | D | 29,761 | $43.48 | 678,390 | D | S |